Question

A nail is inserted at a height of 1metre from the ground after 3 years the nail will

Answer 1

Due to exposure in air and humidity , the nail will get rusted

Answer 2

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When a nail is inserted in the trunk of a tree at a height of 1 metre from the ground, even after 3 year the nail remains at same level. It does not moves upwards as the apical meristem responsible for growth (length) is present in the apices only and lateral meristem responsible of increase in girth will lead to no change in length.

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